Do you have a UNIX-based installation server installed? Looking at this thread, I get the feeling that you don't
Remove installation is done one of 2 ways:
Using remote access commands, for example
rlogin
rexec
rcp
Using Secure Shell (SSH)
If you are going to use SSH, you need to enable it in the file
/opt/omni/.omnirc
on the Installation server. This file does not exist by default, so you can use the UNIX command
touch /opt/omni/.omnirc
Once the file is created, or, if it already exists, add this line
OB2_SSH_ENABLED=1
Save the file